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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2005 Proceedings-SWSS.pdf#page=185
Last checked: 07/18/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Waltz, F. C. Jr.;
Murphy, T. R. |
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| Author Affiliation: | Department of Crop and Soil Sciences, The University of Georgia, Griffin, CA |
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| Title: | Turfgrass renovation with glyphosate |
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| Section: | Weed management in turfgrass
Other records with the "Weed management in turfgrass" Section
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| Meeting Info.: | Charlotte, North Carolina: January 24-26, 2005 |
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| Source: | Proceedings of the 58th Annual Meeting of the Southern Weed Science Society. Vol. 58, 2005, p. 110. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Crabgrass control; Festuca arundinacea; Glyphosate; Herbicide efficacy; Herbicide evaluation; Turf renovation
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| Abstract/Contents: | "Weedy grass species, like common bermudagrass (Cynodon sp.) a warm-season perennial that reproduces by seed, stolons, and rhizomes, is difficult to selectively control in centipedegrass (Eremochloa ophiuroides) and tall fescue (Festuca arundinacea). Common bermudagrass is throughout the Southeastern United Sates and is used along roadsides, as a forage, for soil stabilization, and a fine turfgrass. For long term control of bermudagrass and efficacy on reestablishment of other turfgrass species into a previously infested area, two field experiments were initiated to evaluate multiple applications of glyphosate prior to turfgrass establishment. Study 1: Long-term bermudagrass control was evaluated following two and three sequential applications of Roundup Pro (glyphosate - IPA 4 SL) prior to reestablishment with seeded tall fescue. The study was established in existing stand of common bermudagrass. Plots were 10 ft × 16 ft in a randomized complete block design with 3 replications. Initial postemergence applications were applied on June 3, 2002 and sequential applications were made on July 16, 2002 and August 28, 2002. Roundup Pro (RUP) was applied at 3 qts / acre as either 2 or 3 applications 4- to 6-weeks apart at a spray volume of 20 gpa. On September 30, 2002, the center 5-ft of each plot was seeded with 'Kentucky-31' tall fescue at 8-pounds / 1000 ft2 using a Ryan Mataway overseeder. Irrigation was applied for germination and as needed to prevent drought stress, thereafter. Plots were maintained at a 3-inch clipping height with a rotary mower, clippings were returned, and fertilized two times annually at a rate of 1-pound nitrogen / 1000 ft2 using a 15-5-15 analysis. For 2-years, plots were evaluated for bermudagrass control and tall fescue density. All evaluations were visual assessments of percent control and density relative to the nontreated. Study 2: Roundup Pro (glyphosate - IPA 4 SL) and glyphosate + diquat (QuikPRO - 73.3% glyphosate-AMS + 2.9% diquat dibromide) were evaluated for renovation of an existing common bermudagrass stand to centipedegrass or tall fescue. Main plots were 6 ft × 20 ft established as a randomized complete block with a strip plot layout, subplots of bermudagrass, centipedegrass, and tall fescue were 6 ft × 6 ft with four replications. Herbicides were applied at 50 gpa on July 16, 2003 and August 27, 2003. RUP followed by (fb) RUP at 3.0 qts / acre or QP at 3.0, 6.0, and 9.0 lbs / acre was applied on July 16, 2003 fb August 27, 2003. RUP at 3.0 qts / acre and QP at 9.0 lbs / acre were applied as single treatments on August 27, 2003. On September 9, 2003, subplots were sodded with 'TifBlair' centipedegrass and 'Millennium' tall fescue. For each treatment a subplot was prepared and not reestablished, allowing common bermudagrass to return from non-killed rhizomes. Three days prior to establishment, plots were mowed to 1-inch with clipping removed, rototilled to 4-inches in two directions, and handraked level. Irrigation was applied for establishment and as needed to prevent drought stress, thereafter. Mowing and fertility were maintained according to proper management for either centipedegrass or tall fescue. Through 2004, plots were evaluated for bermudagrass control; all evaluations were visual assessments of percent control and density relative to the nontreated. One year after seeding tall fescue, bermudagrass control was 98% in plots where three applications of RUP were applied prior to seeding. Bermudagrass control in plots treated with two applications of RUP was no different than the nontreated control or plots which were not seeded. At 2, 9, and 12 months after seeding, tall fescue density was greater in plots treated with three applications of RUP than plots treated twice. Tall fescue stand density was 87% twelve months after seeding after three applications; density was 20% and 10% for twice treated and nontreated respectively. Herbicide application did not inhibit centipedegrass or tall fescue establishment from sod. Improved bermudagrass control was observed in plots reestablished into another turfgrass species, indicating that competition is important in long-term suppression of bermudagrass. In plots which were treated and prepared for sodding but not planted, RUP 3.0 fb QP 3.0 had 61% bermudagrass control 59 weeks after initial treatment, which would be considered unacceptable. All other treatments had less than 45% control. From these studies, effective bermudagrass control can be achieved with three applications of RUP. However, one year's data indicate that improved control can be achieved when two applications of glyphosate are followed by turfgrass establishment." |
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| Language: | English |
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| References: | 0 |
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| Note: | "The changing world of weed science"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Waltz, F. C. Jr., and T. R. Murphy. 2005. Turfgrass renovation with glyphosate. South. Weed Sci. Soc. Proc. 58:p. 110. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2005 Proceedings-SWSS.pdf#page=185
Last checked: 07/18/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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